
a, address, b, big, blockquote, body, center, cite, code, dd, del, div, dl, dt, em, fieldset, font, form, h1, h2, h3, h4, h5, h6, html, i, iframe, img, ins, label, legend, li, ol, p, pre, small, span, strong, u, ul, var {
    padding: 0;
    margin: 0;
}


a {
    color: black;
    text-decoration: none;
}

ul {
    list-style: none;
}

#tab {
    width: 1000px;
    height: 800px;
    border: 1px solid #ddd;
    box-shadow: 0 0 2px #ddd;
    text-align: center;
    align-content: center;
    margin: 100px 100px 100px 200px;
    /*处理超出的内容*/
    overflow: hidden;
}

/*选项卡的头部*/
#tab-header {
    background-color: #F7F7F7;
    height: 33px;
    text-align: center;
    position: relative;
}

#tab-header ul {
    width: 1000px;
    position: absolute;
    left: -1px;
}

#tab-header ul li {
    float: left;
    width: 98px;
    height: 33px;
    line-height: 33px;
    padding: 0 1px;
    border-bottom: 1px solid #dddddd;
}

#tab-header ul li.selected {
    background-color: white;
    font-weight: bolder;
    border-bottom: 0;
    border-left: 1px solid #dddddd;
    border-right: 1px solid #dddddd;
    padding: 0;

}

#tab-header ul li:hover {
    color: orangered;
}

/*主要内容*/
#tab-content .dom {
    display: none;
}

#tab-content .dom ul li {
    float: left;
    /*background-color: red;*/
    margin: 15px 10px;
    width: 225px;
}

#tab-content .dom ul li a:hover {
    color: orange;
}